Answered: the angular velocity

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter8: Rotational Equilibrium And Rotational Dynamics

Section8.5: Relationship Between Torque And Angular Acceleration

Problem 8.2QQ: A constant net torque is applied to an object. Which one of the following will not be constant? (a)...

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An airliner arrives at the terminal, and the engines are shut off. The rotor of one of the engines has an initial clockwise angular velocity of 2000 rad/s. The engine’s rotation slows with an angular acceleration of magnitude 80.0 rad/s².

(a)Determine the angular velocity after 10.0 s.

(b) How long does it take the rotor to come to rest?

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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